package exception;

public class TryCatchDemo {
    public static void main(String[] args) {
        System.out.println("程序开始了");
        try {
          //  String line = null;
            String line="hello";
            System.out.println(line.length());
            System.out.println(line.charAt(3));
            System.out.println(Integer.parseInt(line));
            System.out.println("!!!!!!!!!!!");
       /* } catch (NullPointerException e) {
            System.out.println("出现了空指针");
        }catch (StringIndexOutOfBoundsException e){
            System.out.println("出现下标越界");
        }*/}catch (NullPointerException|StringIndexOutOfBoundsException e){
            System.out.println("出现了空指针或下标越界");
        }catch (Exception e){
            System.out.println("出现一个未知错误");
        }
        System.out.println("程序完成");
    }
}
